G'Day Paul,
I have a little old Hamilton Colorado Junior jet unit in a 16'
"Lewis" hull. I've been puzzling over whether or not a P port
rotary would have enough torque at low revs to spin it, if so
how about a single rotor, as it's only meant to absorb 100 hp.
All the published torque curves I've seen seem to show little
torque below 3000 rpm.

I have enough 13B parts to experiment in a boat before I try to
fly on one. It would be an ideal test-bed to play with ignitions
and carburettors. I flew for many years on a VW using an
outboard motor fly-wheel alternator to charge the battery. I
didn't try to use the outboard ignition. I think it was a
Mercury.

John Evans

If it is a jet boat it has a high RPM pump I think.
16 feet ought to handle the weight of a two rotor. 250 HP would
really get it going :)

Paul Lamar



The Berkley and Jacuzzi jet units can be outfitted with impellers that
have different effective pitch. Hamilton pumps might also have
different impellers available for similar reasons.

Matt-

The Chevy V8 units run 4700 RPM max so you might be giving
away some HP unless you can reduce the pitch on the blades
to allow the rotary to rev up to 7500 or so.

Paul Lamar